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#include <bits/stdc++.h>
using namespace std;
ifstream fin ("scmax.in");
ofstream fout("scmax.out");
int a[100010],maxi,n,i,j,best[100010],poz[100010],p;
void dp()
{
best[n]=1;
poz[n]=-1;
maxi=0;
for(i=n-1;i>=1;i--)
{
best[i]=1;
poz[i]=-1;
for(j=i+1;j<=n;j++)
if(a[i]<a[j] && best[i]<best[j]+1)
{
best[i]=best[j]+1;
poz[i]=j;
if(best[i]>maxi)
maxi=best[i],p=i;
}
}
}
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
dp();
fout<<maxi<<'\n';
while(p!=-1)
{
fout<<a[p]<<" ";
p=poz[p];
}
return 0;
}